Cop-tube.



IATENTED AUG. z5, 190s.

A TTOHNE Yo,

E,k E.. THQRNB.

Cm? TUBE.'

APPLwATmR um@ un. 24. 190s.

N0 MODEL.

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UNTTED STATES Patented August 25, 1903.

PATENT OFFICE.A

EDWARD H. THORNE, OFv FALL RIVER, MASSACHUSETTS, ASSIGNOR TO DOUGLAS MANUFACTURING COMPANY, OF FALL RIVER,

MASSACHUSETTS.

COP-TUBE.

SPECIFICATION forming part of Letters lsatent No. 737,531, dated August 25, 1903.

Application filed April 24, 1903.

To (1J/Z, whom t may concern:

Be it known that I, EDWARD H. THORNE, a subject of theKing of Great Britain,and a resident of Fall River, in the county of Bristol and State of Massachusetts, have invented a new and Improved Cop-Tube, of which the following is a full, clear, and exact description.

My invention relates to improvements in cop-tubes of that class which are used to contain the winding of yarn in Weavin g machinery, although the improved tube may be used to good ad vantage in holding the Windin gs of other material than yarn.

Attempts have been made to produce a cheap cop-tube by making the same of paper; but ordinary tubes, whether made of paper, wood, or other materials, are not satisfactory owing to the tendency of the winding to sl uff off or become displaced from the t-ube and to the liability of wooden tubes to break. There is a demand in the trade for a cheap and durable cop-tube which will effectively hold the widing of yarn and other material from slufting7 off or displacement from the tube; and the object of the present improvement is to produce an improved article which meets the requirements of practical service.

The invention consists of a paper cop-tube having a frictional holding-surface of a peculiar pattern produced thereon by compressing the tube externally to form a series of inclined or conical portions separated by welldened annular ledges or shoulders, against which the winding is adapted to lodge in a way to wholly overcome slippage along the tube.

Reference is to be had to the accompanying` drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the iigures.

Figure lisa perspective view, on an enlarged scale, of a paper cop-tube before it is compressed to produce the frictional holding-surface thereon. Fig. 2 is a perspective view of the complete cop-tube. Fig. 3 is a longitudinal section, on a greatly-magnified scale, through a portion of a cop-tube embodying my invention; and Fig. 4 is a cross-section Serial No. 154,124. (No model.)

taken in the plane of the dotted line 4 4 of Fig. 3.

A in Fig. 1 designates a paper cop-tube inA an embryo condition, the same being prepared by coiling a strip or sheet of paper upon itself to produce a longitudinal tapered tube of the proper length and of suitable diameter, the coiling of the paper upon itself being represented by the enlarged cross-sectional View in Fig. 4. A cop-tube with a smooth external surface Will not meet the requirements of actual service, because of the tendency of the Winding to slurf off or become displaced when the article is in use in a weaving-machine, and to overcome this tendency of the winding to sluff I provide the cop-tube with a peculiar form Yof holding surface which presents a plurality of concentric ridges or shoulders against which the Winding is adapted to lodge.

After the tube shall have been Wound in the spiral form from a length of paper, as heretofore described, it is treated by compression to produce the frictionalholding-surfaces shown by Figs. 2 and 3 in the form of a series of tapering or conical sections B and a plurality of concentric annular shoulders or ridges C, each section B tapering from one of the shoulders to the next adjacent shoulder. To produce the frictional holding-surface after the tube shall have been completed, it is placed in a machine, mold, or die of any suitable construction or pattern Which exerts sufiicient pressure externally on the tube to compress the paper ibers more solidly on certain annular lines than at other points, and, thereby produce or form the tapering or conical faces B and the annular ridges or shoulders C. The operation of compressing the tube not only produces the tapering surfaces and the shoulders, but the paper stock or fiber is compressed or condensed more solidly at the smaller ends of the conical surfaces than at the enlarged ends of said surfaces, such condensation of the fibers tending to increase the stiffness and rigidity of the tube,

and thereby prolong its durability and life. In the drawings the conical portions of the tube are shown as inclining toward the smaller portions of such faces.v

2. A cop-tube, comprisingaspirally-Wound paper body Which is externally compressed and is formed With a corrugated Windingretaining surface extending longitudinally of said body, the fibers of the body being,` condensed more solidly on certain annular lines than at other points.

3. The method of making cop-tubes, consisting'in spirally Winding a length or strip of paper upon itself to produce a Wound body, and subsequently producing a corrugated Winding-retaining surface on the body by condensing the fibers on annular lines and forming a series of Well-dened annular shoulders.

In testimony whereof I have signed my name to this specification in the presence of tWo subscribing Witnesses.

EDWARD H. THORNE.

/Vitnesses:

MARGARET A. HOLLAND, ALBERT A. HARRISON. 

